Stoves and furnaces – Stove hoods
Patent
1991-09-25
1993-06-22
Yeung, James C.
Stoves and furnaces
Stove hoods
126299D, 454 66, F24C 1520
Patent
active
052209105
DESCRIPTION:
BRIEF SUMMARY
The invention concerns a device and a method for ventilation.
BACKGROUND OF THE INVENTION
From the applicant's FI Patent No. 74,799 of eariler date, an intake and exhaust air device is known wherein the intake air is made to flow into the zone of stay of a person working at a working point. Air is removed through the device so that impurities coming from a source of impurities at the working point are first sucked into an interior hood space in a kitchen hood and from said space through fat filters into the outlet duct.
Correspondingly, from the U.S. Pat. No. 4,072,143, a solution of equipment is known wherein air heated by the stove is removed through a central construction of ducts in a hood.
The prior-art solutions of equipment serve either for ventilation at a specific site or for general ventilation alone. Thus, the prior-art solutions of equipment have not been suitable both for removal of air from a limited site and for general removal of air. In the present invention, attempts have been made to find an improvement for said deficiency involved in prior art.
OBJECTS AND SUMMARY OF THE INVENTION
In the most general embodiment of the invention, a ventilation device is formed through which air is introduced at least as a carrier air jet, which induces carriage of impurities towards the exhaust duct. A duct for general ventilation is arranged to open into an exhaust air chamber. In this manner, through the device, both impurities and/or excessive heat arising at the working point are removed through removal out of a limited area. In addition, air is removed as general removal as the device includes an opening for general ventilation into the exhaust air chamber to pass a flow of exhaust air flow for general ventilation into the exhaust duct.
In an embodiment of the invention, besides an exhaust opening for contaminated air placed inside the hood construction, the device also includes an exhaust opening for general ventilation. Through said exhaust openings, the flow sucked by means of a blower is removed through an exhaust duct common of the exhaust air flows. In a corresponding way, an intake air flow is accomplished by means of the device so that the flows are substantially equally large, in which case no changes need to be made in the overall ventilation. Thus, the adjustment of the general ventilation entering into the room need not be changed, nor does the adjustment of the air flow in the exhaust duct have to be changed.
In all of the prior-art solutions, mentioned above, the exchange of the air in a room is accomplished so that the exhaust air of general ventilation out of the room is sucked through a separate exhaust duct opening into the room. In a corresponding way, air for general ventilation is introduced into the room through a separate intake air duct. In particular in the case of new investments, when new hood constructions are fitted in existing rooms, the general ventilation of the whole room space must be re-adjusted in consideration of the changes in air quantities in the intake air and in the exhaust air caused by the new hood construction. Thus, in the present application, attempts have been made to find a solution for said problem.
In another embodiment of the invention, the intake and exhaust air device so that the amount of air introduced into a room space through the device has been designed is equal to the amount of air removed out of the room through the device.
The device in accordance with the invention may operate as a device of general ventilation for the whole room space. In this manner through the kitchen hood it is possible to introduce all the fresh air to be blown into the room, and through said kitchen hood it is possible to remove all the exhaust air to be removed out of the room.
The device in accordance with the invention is mainly characterized in that the equipment includes a second exhaust air opening, which opens into the exhaust air chamber. The second exhaust air opening is meant for general ventilation, and opens into the room space from the side of th
REFERENCES:
patent: 2481341 (1949-09-01), Pledger
patent: 3217629 (1965-11-01), Ekern
patent: 3530784 (1970-09-01), Courchesne
patent: 3890887 (1975-06-01), Kaufman
patent: 4541409 (1985-09-01), Karst et al.
Aalto Erkki
Kyllonen Pekka
Pellinen Teuvo
Halton Oy
Yeung James C.
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